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Finally figured out why my boom was drifting on the 80 ton

Been fighting a slow drift on the main hoist for weeks. Changed seals, checked the valves, even swapped the relief cartridge (a $120 part, by the way). Turns out it was just a bit of crud stuck in the pilot line check valve. Blew it out with shop air, put it back together, and it's been perfect for the last three loads. Anybody else ever chase a ghost issue for way too long only to find something simple like that?

3 comments

3 Comments

wilson.olivia7d ago

Wait, wait wait... you swapped out a $120 part before blowing out a check valve with shop air? I mean, I'm not judging, but that's like changing your whole engine because your gas cap was loose or something. The pilot line check valve is literally the first or second thing I check when I see drift on an 80 ton, especially if the main relief and seals look fine. Sucks you had to eat that cost on the cartridge though.

david_reed228d ago

Heard a guy at the shop say most pilot line issues are just junk in the system, not the parts themselves. Easy fix once you think to check it though.

the_miles7d agoMost Upvoted

Oh absolutely @david_reed22, because why would anyone ever check the easy stuff first when you can just throw parts at it for three hours. I swear half the time it's just a little piece of crud floating around that even a good blowout would fix. But hey, that would take too much thinking and not enough cussing under your breath.